Argentina: A magnitude-5.6 earthquake occurs in northwestern La Rioja Province at around 05:04 Jan. 3

A magnitude-5.6 earthquake occurred in northwestern La Rioja Province, close to the border with Chile, at around 05:04 Jan. 3. The epicenter was about 72 km (45 miles) west-northwest of Vinchina, La Rioja Province. The tremor occurred at a depth of about 127 km (79 miles), and moderate shaking was probably felt near the epicenter, as well as light shaking throughout parts of northern La Rioja, western Catamarca, and northern San Juan provinces in Argentina and central and southern Atacama and northern Coquimbo regions in Chile. There have been no initial reports of damage or casualties as a result of the earthquake; however, significant damage is unlikely. It could take several hours until authorities can conduct comprehensive damage assessments, especially in remote areas. Light aftershocks are likely over the coming days.

Officials may temporarily shut down transportation infrastructure in the tremor zone to check for damage. Minor disruptions could occur during shutdowns, but service will likely resume quickly if no damage is found. Utility outages are possible, particularly near the earthquake's epicenter.